Bob Greene asks: If you use a blood pressure monitor three times in a row, will it always be lower on the third try? And is that because you've been sitting there or is it because the machine squeezed you once or twice and so it's getting a different reading the third time? Do you have to take the band off and put it back on each time you use it or can you just sit there and hit yes every time? All right. I'm saying your answers are all over the place. Here's why I want to know. Because I did something yesterday that blew my mind. Now, here's what you need to know. You were taught to do a biop